The minor allele T of SNP rs1739843 in the HSPB7 gene was significantly associated with a reduced risk of idiopathic dilated cardiomyopathy (OR 0.72).
Case-Control (n=5,540)
Sí
Does the minor allele of SNP rs1739843 in the HSPB7 gene reduce susceptibility to idiopathic dilated cardiomyopathy?
The identification of the HSPB7 gene variant rs1739843 as a risk factor for idiopathic dilated cardiomyopathy underscores the influence of common genetic polymorphisms on disease susceptibility.
Estimación del efecto: OR 0.72 (95% CI 0.65-0.78)
valor p: p=5.28x10^-13
Dilated cardiomyopathy (DCM) is a structural heart disease with strong genetic background. Monogenic forms of DCM are observed in families with mutations located mostly in genes encoding structural and sarcomeric proteins. However, strong evidence suggests that genetic factors also affect the susceptibility to idiopathic DCM. To identify risk alleles for non-familial forms of DCM, we carried out a case-control association study, genotyping 664 DCM cases and 1,874 population-based healthy controls from Germany using a 50K human cardiovascular disease bead chip covering more than 2,000 genes pre-selected for cardiovascular relevance. After quality control, 30,920 single nucleotide polymorphisms (SNP) were tested for association with the disease by logistic regression adjusted for gender, and results were genomic-control corrected. The analysis revealed a significant association between a SNP in HSPB7 gene (rs1739843, minor allele frequency 39%) and idiopathic DCM (p = 1.06 × 10⁻⁶, OR = 0.67 95% CI 0.57-0.79 for the minor allele T). Three more SNPs showed p < 2.21 × 10⁻⁵. De novo genotyping of these four SNPs was done in three independent case-control studies of idiopathic DCM. Association between SNP rs1739843 and DCM was significant in all replication samples: Germany (n =564, n = 981 controls, p = 2.07 × 10⁻³, OR = 0.79 95% CI 0.67-0.92), France 1 (n = 433 cases, n = 395 controls, p =3.73 × 10⁻³, OR = 0.74 95% CI 0.60-0.91), and France 2 (n = 249 cases, n = 380 controls, p = 2.26 × 10⁻⁴, OR = 0.63 95% CI 0.50-0.81). The combined analysis of all four studies including a total of n = 1,910 cases and n = 3,630 controls showed highly significant evidence for association between rs1739843 and idiopathic DCM (p = 5.28 × 10⁻¹³, OR= 0.72 95% CI 0.65-0.78). None of the other three SNPs showed significant results in the replication stage.This finding of the HSPB7 gene from a genetic search for idiopathic DCM using a large SNP panel underscores the influence of common polymorphisms on DCM susceptibility.
Stark et al. (Thu,) conducted a case-control in Idiopathic Dilated Cardiomyopathy (n=5,540). SNP rs1739843 (HSPB7) minor allele T vs. Major allele was evaluated on Idiopathic dilated cardiomyopathy (OR 0.72, 95% CI 0.65-0.78, p=5.28x10^-13). The minor allele T of SNP rs1739843 in the HSPB7 gene was significantly associated with a reduced risk of idiopathic dilated cardiomyopathy (OR 0.72).